astronomy

Horologium-Reticulum Supercluster

Horologium-Reticulum Supercluster is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Horologium-Reticulum Supercluster rather than just read about it. In short: The Horologium-Reticulum Supercluster, is a massive supercluster spanning around 550 million light-years. It has a mass of around 1017 solar masses, similar to that of the Laniakea Supercluster, which houses the Milky Way.

Key takeaways

Horologium-Reticulum Supercluster belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Horologium-Reticulum Supercluster to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Horologium-Reticulum Supercluster from memory before moving on to harder problems.

Reference excerpt

The Horologium-Reticulum Supercluster, is a massive supercluster spanning around 550 million light-years. It has a mass of around 1017 solar masses, similar to that of the Laniakea Supercluster, which houses the Milky Way. It is centered on coordinates right ascension 03h 19m and declination −50° 02′, and spans an angular area of 12° × 12°. The nearest part of the supercluster is 700 million light-years away from Earth, while the far end of it is 1.2 billion light-years. It is visible in the constellations Horologium and Eridanus. The Horologium Supercluster has about 5,000 galaxy groups (30,000 giant galaxies and 300,000 dwarf galaxies). It includes the galaxy cluster Abell 3266. The first observation of the Horologium Supercluster was in 1899; Harlow Shapley noticed it in 1935. The first attempt to study the supercluster after Shapley was in 1983.

Members The Horologium-Reticulum Supercluster (SCL 48) is a supercluster that contains approximately 35 galaxy clusters, making it one of the largest in the local universe and it is the second largest in the Main Supercluster Catalogue (MSCC) catalog. The galaxy clusters which are Abell 3004, 3009, 3045, 3074, 3077, 3078, 3089, 3093, 3098, 3100, 3104, 3106, 3108, 3109, 3110, 3111, 3112, 3116, 3120, 3122, 3123, 3125, 3128, 3133, 3135, 3142, 3145, 3154, 3158, 3161, 3164, 3195, 3202, 3225, 3266. However, there is another catalog that suggests that there is another 30 additional galaxy clusters such as Abell 383.

See also Abell catalogue Large-scale structure of the universe List of Abell clusters List of superclusters List of largest cosmic structures

References

Illustrations

Worked examples

Example 1 — a first encounter with Horologium-Reticulum Supercluster

Start with the simplest possible case. Write down what Horologium-Reticulum Supercluster claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Horologium-Reticulum Supercluster before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Horologium-Reticulum Supercluster ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Horologium-Reticulum Supercluster

In research: Horologium-Reticulum Supercluster appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Horologium-Reticulum Supercluster in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Horologium-Reticulum Supercluster is common in secondary-school and first-year university syllabi. It links to neighbouring topics Eridanus (constellation), Galaxy superclusters, Horologium (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for Horologium-Reticulum Supercluster outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Horologium-Reticulum Supercluster in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Horologium-Reticulum Supercluster means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Horologium-Reticulum Supercluster out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Horologium-Reticulum Supercluster in simple terms?

Why does Horologium-Reticulum Supercluster matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Horologium-Reticulum Supercluster?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Horologium-Reticulum Supercluster.